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use std::collections::HashMap;
use std::fmt::Debug;
use failure::{Fail, Fallible};
use log::*;
use crate::browser::tab::point::Point;
use crate::browser::tab::NoElementFound;
use crate::protocol::dom;
use crate::protocol::page;
use crate::protocol::runtime;
mod box_model;
use crate::protocol::runtime::methods::RemoteObjectType;
pub use box_model::{BoxModel, ElementQuad};
pub struct Element<'a> {
pub remote_object_id: String,
pub backend_node_id: dom::NodeId,
pub parent: &'a super::Tab,
}
impl<'a> Debug for Element<'a> {
fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
write!(f, "Element {}", self.backend_node_id)?;
Ok(())
}
}
impl<'a> Element<'a> {
pub fn new(parent: &'a super::Tab, node_id: dom::NodeId) -> Fallible<Self> {
if node_id == 0 {
return Err(NoElementFound {}.into());
}
let backend_node_id = parent
.describe_node(node_id)
.map_err(NoElementFound::map)?
.backend_node_id;
let remote_object_id = {
let object = parent
.call_method(dom::methods::ResolveNode {
backend_node_id: Some(backend_node_id),
})?
.object;
object.object_id.expect("couldn't find object ID")
};
Ok(Element {
remote_object_id,
backend_node_id,
parent,
})
}
pub fn move_mouse_over(&self) -> Fallible<&Self> {
self.scroll_into_view()?;
let midpoint = self.get_midpoint()?;
self.parent.move_mouse_to_point(midpoint)?;
Ok(self)
}
pub fn click(&self) -> Fallible<&Self> {
self.scroll_into_view()?;
debug!("Clicking element {:?}", &self);
let midpoint = self.get_midpoint()?;
self.parent.click_point(midpoint)?;
Ok(self)
}
pub fn type_into(&self, text: &str) -> Fallible<&Self> {
self.click()?;
debug!("Typing into element ( {:?} ): {}", &self, text);
self.parent.type_str(text)?;
Ok(self)
}
pub fn call_js_fn(
&self,
function_declaration: &str,
await_promise: bool,
) -> Fallible<runtime::methods::RemoteObject> {
let result = self
.parent
.call_method(runtime::methods::CallFunctionOn {
object_id: &self.remote_object_id,
function_declaration,
return_by_value: false,
generate_preview: true,
silent: false,
await_promise,
})?
.result;
Ok(result)
}
pub fn focus(&self) -> Fallible<&Self> {
self.scroll_into_view()?;
self.parent.call_method(dom::methods::Focus {
backend_node_id: Some(self.backend_node_id),
..Default::default()
})?;
Ok(self)
}
pub fn get_description(&self) -> Fallible<dom::Node> {
let node = self
.parent
.call_method(dom::methods::DescribeNode {
node_id: None,
backend_node_id: Some(self.backend_node_id),
depth: Some(100),
})?
.node;
Ok(node)
}
pub fn capture_screenshot(&self, format: page::ScreenshotFormat) -> Fallible<Vec<u8>> {
self.scroll_into_view()?;
self.parent
.capture_screenshot(format, Some(self.get_box_model()?.content_viewport()), true)
}
pub fn set_input_files(&self, file_paths: &[&str]) -> Fallible<&Self> {
self.parent.call_method(dom::methods::SetFileInputFiles {
files: file_paths,
backend_node_id: Some(self.backend_node_id),
node_id: None,
object_id: None,
})?;
Ok(self)
}
pub fn scroll_into_view(&self) -> Fallible<&Self> {
let result = self.call_js_fn(
"async function() {
if (!this.isConnected)
return 'Node is detached from document';
if (this.nodeType !== Node.ELEMENT_NODE)
return 'Node is not of type HTMLElement';
const visibleRatio = await new Promise(resolve => {
const observer = new IntersectionObserver(entries => {
resolve(entries[0].intersectionRatio);
observer.disconnect();
});
observer.observe(this);
});
if (visibleRatio !== 1.0)
this.scrollIntoView({
block: 'center',
inline: 'center',
behavior: 'instant'
});
return false;
}",
true,
)?;
if result.object_type == RemoteObjectType::String {
let error_text = result.value.unwrap().as_str().unwrap().to_string();
return Err(ScrollFailed { error_text }.into());
}
Ok(self)
}
pub fn get_attributes(&self) -> Fallible<Option<dom::NodeAttributes>> {
let description = self.get_description()?;
Ok(description.attributes)
}
pub fn get_box_model(&self) -> Fallible<BoxModel> {
let model = self
.parent
.call_method(dom::methods::GetBoxModel {
node_id: None,
backend_node_id: Some(self.backend_node_id),
object_id: None,
})?
.model;
Ok(BoxModel {
content: ElementQuad::from_raw_points(&model.content),
padding: ElementQuad::from_raw_points(&model.padding),
border: ElementQuad::from_raw_points(&model.border),
margin: ElementQuad::from_raw_points(&model.margin),
width: model.width,
height: model.height,
})
}
pub fn get_midpoint(&self) -> Fallible<Point> {
let return_object = self.parent.call_method(dom::methods::GetContentQuads {
node_id: None,
backend_node_id: Some(self.backend_node_id),
object_id: None,
})?;
let raw_quad = return_object.quads.first().unwrap();
let input_quad = ElementQuad::from_raw_points(&raw_quad);
Ok((input_quad.bottom_right + input_quad.top_left) / 2.0)
}
pub fn get_js_midpoint(&self) -> Fallible<Point> {
let result =
self.call_js_fn("function(){ return this.getBoundingClientRect(); }", false)?;
let properties = result
.preview
.expect("JS couldn't give us quad for element")
.properties;
let mut prop_map = HashMap::new();
for prop in properties {
prop_map.insert(prop.name, prop.value.unwrap().parse::<f64>().unwrap());
}
let midpoint = Point {
x: prop_map["x"] + (prop_map["width"] / 2.0),
y: prop_map["y"] + (prop_map["height"] / 2.0),
};
Ok(midpoint)
}
}
#[derive(Debug, Fail)]
#[fail(display = "Scrolling element into view failed: {}", error_text)]
struct ScrollFailed {
error_text: String,
}